android_multiviewwer/app/src/main/res/drawable/rounded_bg.xml

<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true">
        <shape>
            <corners
                android:radius="15dp" />
            <solid
                android:color="@android:color/transparent" />
            <stroke
                android:width="0.5dp"
                android:color="?attr/scrimBackground" />
        </shape>
    </item>
    <item android:state_pressed="false">
        <shape>
            <corners
                android:radius="15dp" />
            <solid
                android:color="?attr/scrimBackground" />
        </shape>
    </item>
</selector>